selectFirst() on javafx ListView dont select the element - javafx

Question

i have small application to manage my tasks. I created DB(sqlite), and i store there a data.
After i log in i got dashboard scene. On dashboard scene i have implemented ObservableList which store taskList and their details. This list is updated always when i add/modify/delete tasks.
I have problem when i add/modify/delete task, when i do it the list is correctly updated but the item witch i add/modify is not selected after operation although i have that implemented.
The Main code:
public class Main extends Application {
private static Main instance;
public BorderPane mainBorderPane;
private Stage primaryStage;
public static Main getInstance() {
return instance;
}
#Override
public void start(Stage primaryStage) throws Exception{
instance = this;
this.primaryStage = primaryStage;
this.primaryStage.setTitle("Hello World");
showDashboardScene();
}
private void showDashboardScene() throws IOException {
FXMLLoader loader = new FXMLLoader();
loader.setLocation(getClass().getResource("/sample/dashboard.fxml"));
mainBorderPane = loader.load();
Scene scene = new Scene(mainBorderPane);
primaryStage.setScene(scene);
primaryStage.initStyle(StageStyle.UTILITY);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
DashboardController:
public class DashboardController {
private ObservableList<Task> tasks = FXCollections.observableArrayList();
#FXML
private ListView<Task> taskListView;
public void initialize() throws SQLException {
tasks = TaskData.getInstance().getTaskList();
findListChange();
taskListView.setItems(tasks);
taskListView.getSelectionModel().setSelectionMode(SelectionMode.SINGLE);
taskListView.getSelectionModel().selectFirst();
}
public void refreshView() {
tasks = TaskData.getInstance().getTaskList();
findListChange();
taskListView.setItems(tasks);
taskListView.getSelectionModel().selectedItemProperty();
taskListView.getSelectionModel().selectLast();
}
private void findListChange() {
this.taskListView.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<Task>() {
#Override
public void changed(ObservableValue<? extends Task> observable, Task oldValue, Task newValue) {
if (newValue != null) {
Task item = taskListView.getSelectionModel().getSelectedItem();
}
}
});
}
}
dashboard.fxml
<?import javafx.scene.layout.BorderPane?>
<?import javafx.scene.control.ListView?>
<BorderPane fx:controller="sample.DashboardController" xmlns:fx="http://javafx.com/fxml" >
<top>
<fx:include fx:id="mainMenu" source="/sample/menu.fxml"/>
</top>
<left>
<ListView fx:id="taskListView"/>
</left>
</BorderPane>
MenuController
public class MenuController {
public void showDialog() throws SQLException, IOException {
FXMLLoader loader = new FXMLLoader();
loader.setLocation(getClass().getResource("/sample/addTask.fxml"));
loader.load();
AddTaskController controller = loader.getController();
controller.showAddTaskDialog();
}
}
menu.fxml
<?import javafx.scene.control.MenuBar?>
<?import javafx.scene.control.Menu?>
<?import javafx.scene.control.MenuItem?>
<MenuBar fx:controller="sample.MenuController" xmlns="http://javafx.com/javafx"
xmlns:fx="http://javafx.com/fxml ">
<Menu text="Tasks">
<MenuItem text="Add" onAction="#showDialog"/>
</Menu>
</MenuBar>
addTask.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.GridPane?>
<DialogPane xmlns="http://javafx.com/javafx" xmlns:fx="http://javafx.com/fxml"
fx:controller="sample.AddTaskController">
<content>
<GridPane vgap="10" hgap="10" >
<Label text="Name" GridPane.rowIndex="0" GridPane.columnIndex="0"/>
<TextField fx:id="taskNameTF" GridPane.rowIndex="0" GridPane.columnIndex="1"/>
</GridPane>
</content>
</DialogPane>
AddTaskController:
public class AddTaskController {
#FXML
private TextField taskNameTF;
#FXML
public void showAddTaskDialog()throws IOException, SQLException {
Dialog<ButtonType> dialog = new Dialog<>();
dialog.initOwner(Main.getInstance().mainBorderPane.getScene().getWindow());
FXMLLoader loader = new FXMLLoader();
loader.setLocation(getClass().getResource("/sample/addTask.fxml"));
try {
dialog.getDialogPane().setContent(loader.load());
} catch (IOException e) {e.printStackTrace();
System.out.println("Nie udało sie wyświetlić panelu, prosimy spróbować później");
e.printStackTrace();
return;
}
dialog.getDialogPane().getButtonTypes().add(ButtonType.OK);
dialog.getDialogPane().getButtonTypes().add(ButtonType.CANCEL);
Optional<ButtonType> result = dialog.showAndWait();
if(result.isPresent() && result.get().equals(ButtonType.OK)) {
AddTaskController controller = loader.getController();
controller.addTaskToList();
FXMLLoader fxmlLoader = new FXMLLoader();
fxmlLoader.setLocation(getClass().getResource("/sample/dashboard.fxml"));
fxmlLoader.load();
DashboardController dashboardController = fxmlLoader.getController();
dashboardController.refreshView();
System.out.println("OK, pressed");
} else {
System.out.println("CANCEL, pressed");
}
}
private void addTaskToList() {
String taskName = taskNameTF.getText().trim();
TaskData.getInstance().addTaskToList(new Task(taskName));
}
}
Task
public class Task {
private String taskName;
public Task(String taskName) {
this.taskName = taskName;
}
#Override
public String toString() {
return taskName.toString();
}
}
TaskData
public class TaskData {
private ObservableList<Task> tasks = FXCollections.observableArrayList();
private static TaskData instance = new TaskData();
public static TaskData getInstance() {
return instance;
}
public ObservableList<Task> getTaskList() {
return tasks;
}
public void addTaskToList(Task task) {
instance.tasks.add(task);
}
}
i'm not sure but when i initialize a application, reference to ListView is different than reference of list when i add/modify item. I think this is the problem but i dont know how to fix it ;/